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Welcome to the Paradox Community Paradox Programming Articles page! Below you'll see various articles focusing on Paradox® developer needs and interests.

To request an article on a certain topic, please complete our request form with the relevant information.

Developer Articles
TitleAuthor/ContributorDate
ActiveX controls - A step by step tutorial Peter Zevenaar 26 Feb 2002
  Expand the scope of your Paradox applications. Play videos, read MP3 tags, use a calendar, or have your computer turned into a web server. These are only few of the possibilities with ActiveX controls...

Base64 Encoding Rick Kelly 19 Jul 2003
  Rick shows us how to encode and decode strings with one of the most common encoding routines in use today!

Calendar Tables and Derived Date Information Larry DiGiovanni 03 Jun 2003
  How to use calendar tables for obtaining derived date information for use in queries, reports, and forms!

Combining setRange() with setGenFilter() - the best of both worlds Tony McGuire 13 Jun 2001
  How to combine setRange() and setGenFilter() to show your users exactly what they want to see - with nothing they don't.

Do It Yourself Referential Integrity Liz Woodhouse 28 Jun 2001
  Built-in referential integrity features not good enough for you? Do it yourself!

Email Address Validation Rick Kelly 30 Apr 2004
  Rick provides us with this article and sample code for the challenging task of validating email addresses.

Finding files on your computer and sorting an array Arthur van Lokhorst 07 Sep 2001
  Arthur gives us some recursive routines with sample download!

Getting Started - What Are Libraries and How Are They Used Jeff Cranston 23 Jun 2001
  Don't wait to get started with libraries; check out Jeff's first article in this series!

Implementing a Table Based Menu System Carolyn Wendover 12 Jan 2002
  Carolyn gives us the ins and outs of designing a table based menu system!

Impossible ObjectPAL Techniques Mark Pauker 06 Mar 2002
  This three page article from 1994 details some things you might have thought Paradox couldn't do! Included: Modifying a Form, Programming Reports, Multitasking, Hard to Call DLLs and Status Messages

Internal Shortcuts JD Adams 28 Mar 2002
  JD shows us how to set up a system for creating shortcuts to different applications or parts of applications in Paradox's Tools menu. Sample files are included.

Manipulating Paradox Desktop Windows Vladimir Menkin 17 Jun 2001
  Vladimir covers the basics of manipulating windows open in Paradox.

Manipulating Strings with ObjectPAL Al Breveleri 22 Jan 2002
  Al covers everything you ever needed to know (and then some) about manipulating strings!

Multiple Selection List Boxes Kim Howarter 03 Feb 2004
  Kim shows us how to use a table-driven two list-box method to allow users to select multiple items from a list and because it's table-driven, the same dialog can be used for all your multi-select needs!

Paradox BDE API: Reading and Updating the BDE Configuration File Rick Kelly 02 Jun 2003
  Everything you ever wanted to know about using the BDE's API to determine and set BDE configuration options!

Paradox Date, Time, and DateTime Data Types: Introduction and Internal Formats Rick Kelly 23 Jun 2001
  Get ready for this series on dates by checking out part 1: Introduction and Internal Formats!

Paradox Date, Time, and DateTime Data Types: B.C. Date Adjustments Rick Kelly 30 Jun 2001
  Travel back in time with part 2 in Rick's series: B.C. Date Adjustments!

Paradox Date, Time, and DateTime Data Types: Calculations Using Date Types Rick Kelly 03 Jul 2001
  When was that? Get the answer with part 3 in Rick's series: Calculations Using Date Types!

Paradox Date, Time, and DateTime Data Types: Basic Astronomy and Time Types Rick Kelly 10 Jul 2001
  Break out the telescope and the beach ball for part 4 in Rick's series: Basic Astronomy and Time Types!

Paradox Date, Time, and DateTime Data Types: More B.C. Date Tips and Tricks Rick Kelly 08 Oct 2001
  Rick reveals more problems and more solutions for dealing with B.C. Dates!

Paradox Date, Time, and DateTime Data Types: Odds and Ends - Fiscal Periods Rick Kelly 01 Jan 2002
  Rick details how to calculate those pesky fiscal periods!

Paradox Date, Time, and DateTime Data Types: Odds and Ends - Thirteen Month Rolling Histories Rick Kelly 08 Jan 2002
  Rick expands on fiscal periods by exploring the concept of a thirteen month rolling history!

Paradox Date, Time, and DateTime Data Types: Odds and Ends - Thirteen Month Rolling History Summary Calculations Rick Kelly 16 Jan 2002
  Rick shows us how to add summary calculations to the thirteen month rolling history!

Paradox Runtime Paradox Community 23 May 2001
  Curious about runtime? Read this brief explanation, and let us know if you have questions.

Passing Variables between Forms Using a Library - Part 1: Passing a Single Variable Tom Krieg 21 Jun 2001
  Tom passes variables from form to form! Find out how you can too!

Searching A Normalized Database Luuk Houwen 08 Feb 2002
  Luuk shows us the trick to searching normalised databases where the data table contains an ID value and a reference/lookup table contains the text being searched for!

Speed Comparisons Tony McGuire 23 May 2001
  This compilation shows that you can dramatically increase your application's speed by using tcursors and setRange() in place of queries.

TWAIN Support in ObjectPAL: Series Content, Definitions and Requirements Paul Cronk 11 Aug 2001
  Paul covers everything you ever wanted to know about in this 8-page article on TWAIN Support in ObjectPAL!

Transaction Basics Stefan Bodingh 02 Jul 2001
  Start a transaction today with Stefan's article on how to use transactions with Paradox tables!

Using Color Gradients Rick Kelly 03 Jul 2004
  Rick shows us how to get that color gradient effect in Paradox forms!

Using Inno to Install a Paradox Application Ken Loomis 29 Jun 2003
  Ken walks us through creating a fully functional setup program for Paradox and the BDE.

Using Win32 API Functions with Structures: Explanation and Example Pascal Hutton 21 Jun 2001
  Pascal opens sheds some light on using DLLs which require structures!

Using ini-files and two other useful functions Arthur van Lokhorst 08 Oct 2001
  Arthur gets serious about INI files!

Using the Alfafish MP3 tag reader/writer ActiveX control in Paradox Peter Zevenaar 05 Aug 2001
  Peter shows us how to make the most of our MP3 files with this free ActiveX control!

Using the Microsoft TreeView Control in Paradox Liz Woodhouse 30 Jul 2001
  Liz details how to use the MS treeview control, and also lists a few 3rd-party controls.

Where to Put Code Mike Prestwood 09 May 2002
  Mike offers some guidance with that elusive question of where exactly to put your code!

Win32 API and Printers: Get Default Printer and Printer Properties Rick Kelly 22 Jul 2002
  Learn how the Win32 API can give you more printing control than ever before!

Win32 API and Printers: Setting Default Windows Printer Rick Kelly 31 Jul 2002
  Learn how to set the default printer not just for Paradox, but for Windows itself, in part 2 of Rick's series!

Win32 API and Printers: Getting Printer Jobs Rick Kelly 03 Aug 2002
  Get one step closer to managing your printer and print jobs with this article on retrieving printer spooler jobs.

Win32 API and Printers: Controlling Printers and Printer Jobs Rick Kelly 10 Aug 2002
  Rick shows us how to control the status of a printer and manage print jobs.

Win32 API and Printers: Print Directly to a Printer Rick Kelly 17 Aug 2002
  Learn how to print directly to the printer without going through the usual print dialogs.

Win32 API and Printers: Changing Printer Attributes Rick Kelly 27 Aug 2002
  Rick shows us how to change or update a Windows printer!



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 Modified: 03 Jul 2004
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